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What do the Modbus Plus LED blink codes mean?

Published date: 29 July 2019

The Activity LED on the Modbus Plus device is blinking in an unusual pattern. What do the Modbus Plus LED blink codes mean?

Product Line:
M340 Modbus Plus Proxy
Quantum PLC

Unity Pro
Ecostruxure Control Expert


Below you will find a similar Modbus Plus blink code table in the manual for each Modbus Plus device in question:

Note: The blinking pattern of Six flashed per second can also be interpret ted as continuously blinking without pausing.

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